Bump travis.yml ruby to 2.1.2 to match Gemfile
Bump travis.yml ruby to 2.1.2 to match Gemfile

empirical-org/Empirical-Core,empirical-org/Empirical-Core,empirical-org/Empirical-Core,empirical-org/Empirical-Core,empirical-org/Empirical-Core,empirical-org/Empirical-Core,empirical-org/Empirical-Core